Best Answer: I'd say about 10-15 mins walking at a relatively average pace!! Fastest time to run a mile is around 4 minutes. The average time to walk a mile is 12 minutes, so half a mile would be 6 minutes. i walk a mile every morning in 15-20 minutes, so probably 10 minutes. At a semi rapid rate about 7 1/2 minutes.
Allergy is one of the most common causes for burning sensation in nose. It can be a seasonal allergy or an allergy associated with pollution. Certain gases and smoke released from chemical substances may pollute the air and find their way into the nose and air passages.
If there is strong evidence of nasal allergies or sinus congestion, they will probably want to begin with treatment of those and see if the problem with the burning smell improves. They can also evaluate you for evidence of rarer, but more serious, causes of strange smells, such as a seizure disorder or a tumor.